Bridge.



J. B. STRAUSS.

BRIDGE.

APPLICATION HLED 956.8, 1908 Patented Aug. 2 1915.

Specification of Lefiel's Pate lipplicaiion filed December 8, 15308. Serial lilo.

To all wlwm it may concern lle ll; known that l, JOSEPH B. S'E'RAUSS, a citizen of the l mited i ltntcs residing at hic ol in the county 0'? (Took and State oi" have invented certain new and use- 'ovcnicnls in Bridges, of which the. ng a specification.

My invention relates to bridges and has for its object to provide a nw and improvecl bridge of the cypo having a lifting counterweightcd span.

Bowl-ring lo he accompanying drawings,

Figure a view showing onc form of the. bridge; Fig. 2 is a plan view 0% own 1 1; F g. 3 is a 58 333021 line 3----3 of l umoruls refer to like parts throughill figures.

fez-ring lo Figs. 1 and 2, have shown a moving span 1 mounicd upon suitable pivots or trunnions 2. The moving span is inolmlciluyon :1 support associated with ihc fXEQi spin 3. truss is connected with tho moving span -r applying power to This lifting is s i in outline in Fig. 3 and has conneclod herewith the rock 5 which is engaged 1; *ho ear (3 to which the power'is applied.

iis truss is a short truss and its sills members substantially parallel the trusses oi the moving spun and ad acent thcrclo, a portion oi? the cruss overlapping ii. po "on of the moving span and making m with the moving spam by 1:1 oi" urns girzlcrs which engage tho'ino 12' span, so that us. the lifting truss is moves lira mar ing span moves with il /{both ills moving" spun and tho lifting; spa-11 bsing mounted upon tho sumc'pivolsor trunrgious l notion is clearly seen in n hccivecn the cradling truss moi rig span may be maclo in any :siz miinncr, depending of course upon she two of bridge being built, the nccossary condition being that when power is applied to the cradling truss the moving span Will oo in: ell.

in the drawings which illustrzito the construction in :1 diagrammatic n'muuer, the side llHililJQlS oi" the cradling truss are purzillol with tho tililQ members or the 11min 1 usses oi the nzoving sl'mn, and the cradling and which engage the moving span. so ilni) A separate lifmng' cradling when power a; lo inc cradling iruss the moving span W e lifted. ln thc purticulzzr construc'iion shown, the girders l pass under the moving spun and under the side members of lzhc c 'iulling "truss and. are

stencil ihcrcio in :11. i l

I la w (lcsireil manner. ll counterwclghl Y is pivotally connected to tho cradling truss by the links 8 and to the fixed. support 9 by the links 10, said counccr- Weight being thus applied to the moving through the c mulling truss. This con-- structio'n gives a very important practical adronizs'ge in licliii Worli' and very grczitlf. facilitates lilic erection of the bridge.

cl and built separately. In erecting tho idge, ill-c lilting truss, which 1s short and light compared to the moving span, can be completely put in place and alincd on its ili"z.'1I1l9l1S Without the necessity of handling tho full Weight of the moving span and after ing; span will also be lifted when, the lifting is lifted. In the structure shown the of cho niovin span stops substantho irunuions.

l l have shown iJlPB lil'iing truss xlccn away so as c0 show tho and of the moving span.

trus.

torn chord in El-out oi the center of she trunnions. It will be noted that the sway bracing omitted to permit the froc pas sage of lh coiuitcrwoiglit.

1 claim: v

A bridge, comprising a moving span, a rotatably mounted cradling truss on which one coil of tho moving span is hold, one end or Hillil cradling truss rigidly engaging the moving spun, tho other cud of said cradling truss projecting bcyond the end of tho moving span. countcriveighf; connected to said projccting end of said cradling truss, and

The

lift'hg; truss and moving span can he (lomain span and approach span to You This cncl is preferably in. culled as shown, so tl'uii tho end oi the bolspan and means on the cradling truss whereby power may be applied to it to lift the bridge.

2. A bridge comprising a moving span, a cradling truss connected with the moving span said cradling truss having side members, the side members of said cradling truss ri idly connected with the moving being in different vertical planes from the vertical planes of the trusses of the moving span, and operating mechanism conynected with the cradling truss whereby the cradling truss may be moved to move the moving spa-n.

3. A bridge COII'IPIlSlIlg a moving span, an

.approach span, a cradlin truss having side members which overlap t e side members of the moving span and the approach span,

said cradling trussrigidly connected with the moving span, and a supporting device on proach span, trusses therefor,-' the trusses of the moving span and approach span being "a alinement, an intermediate cradling truss having members rigidly connected with the tion of the moving span, said cradling truss being mounted on the same trunniens as the moving span.

6. A bridge comprising a moving span, a cradling truss'connected with the moving span, a portion of said cradling truss parallel with and overlapping a portion of the moving span, said cradling truss projecting beyond the end of the moving span forming a part of the operating mechanism and a part of the load carrying structure, an operating mechanism connected with the pro jecting end of said cradling truss for applying power to said cradling truss to move the moving span, and a counterweight connected with the projecting end of said cradling truss for counterbalancing said moving span.

JOSEPH B. STRAUSS. Witnesses EDNA K. REYNOLDS, MINNIE M. LINDENAU. 

